Tri-Valley Opportunity Council, Inc. Would like to extend a heartfelt THANK YOU to our numerous Foster Grandparent Volunteers who serve in 31 schools and daycares throughout nw mn. AmeriCorps Seniors Volunteers like you help make the world a better place with your passion and caring. Tri-Valley Opportunity Council, Inc. Tri-Valley Opportunity Council, Inc. Would like to extend a heartfelt THANK YOU to our numerous Foster Grandparent Volunteers who serve in 31 schools and daycares throughout nw mn. AmeriCorps Seniors Volunteers like you help make the world a better place with your passion and caring. Tri-Valley Opportunity Council, Inc.